I have taken my basement apart a dozen times fixing leaks. Apparently the plumbing division at heartland doesn't take pride in their work and it definitely shows in my camper. Nothing is ran uniform. Pex is either to long or to short. Compression fittings are always leaking. I bought 2 sections of pex, red and blue. Also a crimping tool and bands. I also picked up several 90°'s and couplings. After a few trips to various rv part stores I now have several 90° compression fittings. I replaced maybe 70% of my basement pex plus fittings. The pump always leaked mainly due to the pex inlet supply fitting not seating correctly. I finally got the pex and fitting to it replaced but for a added leak prevention I pulled the pump and placed it inside a 9x13 metal nonstick baking pan. Sealed the screws going through the pan and drilled a hole in the side of the pan for a threaded 3/4" pvc coupling. Jb weld waterweld around the coupling to the pan for a waterproof seal. Drilled a hole in the bottom rear wall of my utility panel and glued in a short section of 3/4" pvc pipe. Now if my pump or inlet/outlet pex ever leaks it will be contained in the pan and drain to the utility wet box. I dump and flush my tanks fairly often so if its leaking I will see it. If you do decide to repair factory pex please keep in mind I have never re-used plastic 90° or couplings without having to double band them. A single band on a plastic used fitting will always leak.